Section 8922, acts Aug. 10, 1956, ch. 1041, 70A Stat. 551; Nov. 2, 1966, Pub. L. 89–718, § 3, 80 Stat. 1115, provided for retirement of a regular grade brigadier general, other than a professor of the United States Air Force Academy, except as provided by section 8301 of title 5, on 30th day after he completes 30 years of service or 5th anniversary of date of his appointment in that regular grade, whichever is later, with authority for Secretary of Air Force to defer retirement in certain cases. See section 635 of this title.

Section 8923, acts Aug. 10, 1956, ch. 1041, 70A Stat. 552; Nov. 2, 1966, Pub. L. 89–718, § 3, 80 Stat 1115, provided for retirement of a regular grade major general, except as provided by section 8301 of title 5, on 30th day after he completes 35 years of service or 5th anniversary of his appointment in that regular grade, whichever is later, with authority for Secretary of Air Force to defer retirement in certain cases. See section 636 of this title.